EXTRA SPACE IS JUST A FEW STAIRS AWAY.
Use this information to determine the proper stairway.
Measure Your Space.
Windsor Wood Folding Attic Stairs
Model |
Model Code |
Stair Type |
Rough Opening |
Finished Clearance |
Clearance between Springs |
Ceiling Height |
Stile size* |
Tread Size* |
Landing space |
Clearance |
Load Rating |
| Windsor | BCT-83 |
Wood |
22 ½ x 48 |
20 ½ x 46 |
17" |
8' 5" |
1 x 4 |
1 x 4 x 13 5/8 |
56" |
62" |
250 |
| Windsor | BC-83 |
Wood |
25 ½ x 48 |
23 ½ x 46 |
20" |
8' 5" |
1 x 4 |
1 x 4 x 16 1/2 |
56" |
62" |
250 |
| Windsor | BET-89 |
Wood |
22 ½ x 54 |
20 ½ x 52 |
17" |
8' 9" |
1 x 4 |
1 x 4 x 13 5/8 |
64" |
66" |
250 |
| Windsor | BET-100 |
Wood |
22 ½ x 54 |
20 ½ x 52 |
17" |
10' 4" |
1 x 4 |
1 x 4 x 13 5/8 |
66" |
79" |
250 |
| Windsor | BE-89 |
Wood |
25 ½ x 54 |
23 ½ x 52 |
20" |
8' 9" |
1 x 4 |
1 x 4 x 16 1/2 |
64" |
66" |
250 |
| Windsor | BE-100 |
Wood |
25 ½ x 54 |
23 ½ x 52 |
20" |
10' 4" |
1 x 4 |
1 x 4 x 16 1/2 |
66" |
79" |
250 |
Premium Wood Folding Attic Stairs
Model |
Model Code |
Stair Type |
Rough Opening |
Finished Clearance |
Clearance between Springs |
Ceiling Height |
Stile size* |
Tread Size* |
Landing space |
Clearance |
Load Rating |
| Premium | AET-89 |
Wood |
22 ½ x 54 |
20 ½ x 52 |
17" |
8' 9" |
1 x 6 |
1 x 6 x 13 5/8 |
61" |
70" |
350 |
| Premium | AET-100 |
Wood |
22 ½ x 54 |
20 ½ x 52 |
17" |
10' 3" |
1 x 6 |
1 x 6 x 13 5/8 |
70" |
80" |
350 |
| Premium | AE-89 |
Wood |
25 ½ x 54 |
23 ½ x 52 |
20" |
8' 9" |
1 x 6 |
1 x 6 x 16 1/2 |
61" |
70" |
350 |
| Premium | AE-100 |
Wood |
25 ½ x 54 |
23 ½ x 52 |
20" |
10' 3" |
1 x 6 |
1 x 6 x 16 1/2 |
70" |
80" |
350 |
| SpaceMaker | AG-89 |
Wood |
30 x 54 |
28 x 52 |
24 ½" |
8' 9" |
1 x 6 |
1 x 6 x 21 |
61" |
70" |
350 |
| SpaceMaker | AG-100 |
Wood |
30 x 54 |
28 x 52 |
24 ½" |
10' 3" |
1 x 6 |
1 x 6 x 21 |
70" |
80" |
350 |
| SpaceMaker | AG-89S |
Wood |
30 x 60 |
28 x 57 3/4 |
24 ½" |
8' 9" |
1 x 6 |
1 x 6 x 21 |
61" |
70" |
350 |
| SpaceMaker | AG-100S |
Wood |
30 x 60 |
28 x 57 3/4 |
24 ½" |
10' 3" |
1 x 6 |
1 x 6 x 21 |
70" |
80" |
350 |
Supreme Aluminum Folding Attic Stairs
Model |
Model Code |
Stair Type |
Rough Opening |
Finished Clearance |
Clearance between Springs |
Ceiling Height |
Stile size* |
Tread Size* |
Landing space |
Clearance |
Load Rating |
| Supreme | SAT-89 |
Aluminum |
22 ½ x 54 |
20 ½ x 52 |
17" |
8' 9" |
1 x 4** |
1 x 4 x 14 1/2** |
68" |
70" |
350 |
| Supreme | SAT-100 |
Aluminum |
22 ½ x 54 |
20 ½ x 52 |
17" |
10' 4" |
1 x 4** |
1 x 4 x 14 1/2** |
73" |
78" |
350 |
| Supreme | SA-89 |
Aluminum |
25 ½ x 54 |
23 ½ x 52 |
20" |
8' 9" |
1 x 4** |
1 x 4 x 17 1/4** |
68" |
70" |
350 |
| Supreme | SA-100 |
Aluminum |
25 ½ x 54 |
23 ½ x 52 |
20" |
10' 4" |
1 x 4** |
1 x 4 x 17 1/4** |
73" |
78" |
350 |
| Supreme | SA-120 |
Aluminum |
25 ½ x 64 |
23 ½ x 62 |
20" |
12' |
1 x 4** |
1 x 4 x 17 1/4** |
84" |
87" |
350 |
| Supreme | SAT-120 |
Aluminum |
22 ½ x 64 |
20 ½ x 62 |
17" |
12' |
1 x 4** |
1 x 4 x 14 1/2** |
84" |
87" |
350 |
| Supreme | SAG-120 |
Aluminum |
30 x 64 |
28 x 62 |
24 ½" |
12' |
1 x 4** |
1 x 4 x 21** |
84" |
87" |
350 |
*Nominal sizes before machining.
**Extruded aluminum, represents comparative sizing
BE SURE TO READ THE INSTRUCTIONS INCLUDED WITH YOUR FOLDING ATTIC LADDER COMPLETELY BEFORE STARTING YOUR PROJECT. THESE FOLDING ATTIC STAIRS ARE DESIGNED FOR RESIDENTIAL USE ONLY.
Download Folding Attic Stairway Installation Instructions
How to Choose the Correct Folding Attic Stairs